1. Pop the popcorn using your preferred method and remove unpopped kernels.
2. In a saucepan, melt butter over medium heat.
3. Stir in erythritol brown sugar and sugar-free corn syrup until dissolved.
4. Add sugar-free marshmallows, stirring until melted and smooth.
5. Remove from heat, stir in vanilla extract.
6. Pour mixture over popcorn, gently coating it.
7. Spread on a foil-lined baking sheet and let cool for 10-15 minutes.
8. Break into clusters and serve.

PREP TIME & NUTRITION:
Prep Time: 10 minutes, Cook Time: 10 minutes, Total Time: 20 minutes, Servings: 8, Calories: 150, Net Carbs: 5g, Fats: 10g, Protein: 2g